Unit 4 Review

A recipe says to use 5 cups of flour to make 75 cookies. What is the constant of proportionality that relates the number of cookies made, y, to the number of cups of flour used, x ? Choose the correct answer from each drop-down menu to complete the statement.

• 50
• 3
• 25
• 15

At a school carnival, tickets can be purchased to participate in different activities. The table shows the total cost for different numbers of tickets. What is the constant of proportionality that relates y , the total cost in dollars, to x , the number of tickets purchased?

• The constant proportionality is 0.25

• The constant of proportionality is 5.
• The constant of proportionality is 10.
• The constant of proportionality is 15.

A table of x- and y-values is shown.

What is the constant of proportionality that relates y to x?

• 4

• 1

• 1/8

• 1/4

The table shows a linear relationship between x and y

Create an equation that describes the relationship shown in the table.

• y= -1/3X + -3

• y=1/3X + 9

• y=-3/1X + -9

• y=-3/1X + 9

Which equation best represents the relationship between x and y in the graph?

• y = 3x − 2

• y = − 1/2x + 3

• y = −2x + 3

• y = 2x + 2 3

George started a coin collection. His dad gave him 50 coins. Each month he will add 10 coins to the collection. Which equation can be used to find y, the total number of coins in George’s collection after x months?

• y = 10x + 50

• y = 50x + 10

• y = 10x - 50

• y = 10x - 50

Natasha has a job putting letters in envelopes to be mailed. In 1 hour she put 52 letters in envelopes.

Which equation best represents y, the total number of letters Natasha puts in envelopes in x hours if she continues at this rate?

• x = y + 52

• y = x + 52

• x = 52y

• y = 52x

An athlete in a gymnastics class masters 4 new skills each week. Create a graph that best represents the relationship between x, the number of weeks the athlete has been in the class, and y, the total number of new skills the athlete has mastered.

Correctly plot a line using TWO points to represent the relationship.

Y - shows the Number of Skills Mastered

X - shows the Number of Weeks

Which answer choice represents a person burning 90 calories by climbing 18 flights of stairs?

• 
• A person who climbs 5 flights of stairs will burn 1 calorie.

• 
• c = f + 5, where c represents the number of calories burned and f represents the number of flights of stairs climbed

A table of x- and y-values is shown.

What is the constant of proportionality that relates y to x?

• 8

• 1/7

• 7

• 5